KCEC
(Kirr's Chess Engine Comparison)
A tournament of original free chess engines
June 16, 2013
Testing summary:
Total: 135,679 games
played by 202 programs
1398 CPU days (X2 4600+)

White wins: 55,227 (40.7%)
Black wins: 47,434 (35.0%)
Draws: 33,018 (24.3%)
White score: 52.9%

Opening statistics

This page shows how many KCEC games were played from various known openings. The table also shows average draw percentage and white score.

ECOOpeningNumber
of
games		DrawsWhite
score
D47QGD semi-Slav, Meran, Wade variation551526.9%53.7%
E15Queen's Indian, Nimzovich variation (exaggerated fianchetto)455225.0%54.4%
B90Sicilian, Najdorf, Byrne (English) attack319622.7%50.7%
D58QGD, Tartakower (Makagonov-Bondarevsky) system286328.7%52.0%
B66Sicilian, Richter-Rauzer, Rauzer attack, 7...a6280820.6%47.9%
A29English, four knights, kingside fianchetto250829.1%49.8%
C11French, Burn variation223727.3%52.5%
D02Queen's pawn game194222.1%52.8%
C19French, Winawer, advance, poisoned pawn variation163122.1%60.7%
D45QGD semi-Slav, Stoltz variation157524.0%52.1%
B19Caro-Kann, classical, Spassky variation154524.7%60.3%
A20English opening144525.3%50.4%
B17Caro-Kann, Steinitz variation134125.0%54.1%
C91Ruy Lopez, closed, Bogolyubov variation127926.8%50.1%
A30English, symmetrical variation119726.4%51.9%
A30English, symmetrical, hedgehog system113227.3%56.1%
D48QGD semi-Slav, Meran, 8...a6111225.1%48.1%
C91Ruy Lopez, closed, 9.d4109725.7%54.1%
B12Caro-Kann, advance variation109322.6%51.7%
C90Ruy Lopez, closed, Pilnik variation103523.6%53.4%
D37QGD, classical variation (5.Bf4)99628.9%51.3%
B47Sicilian, Taimanov (Bastrikov) variation98426.8%53.5%
E12Queen's Indian, Petrosian system96325.3%54.1%
C07French, Tarrasch, open variation95128.7%52.7%
D27QGA, classical, Rubinstein variation94528.0%53.6%
B84Sicilian, Scheveningen (Paulsen), classical variation93025.6%50.1%
E04Catalan, open, 5.Nf391026.5%50.7%
D37QGD, 4.Nf390723.6%56.2%
D43QGD semi-Slav90321.6%50.0%
B22Sicilian, Alapin's variation (2.c3)88225.7%53.6%
E32Nimzo-Indian, classical variation87827.2%51.0%
E97King's Indian, orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation)87620.7%57.4%
A04Reti opening85120.7%52.9%
A07Reti, King's Indian attack (Barcza system)80721.4%50.4%
E10Queen's pawn game80525.7%55.1%
B40Sicilian defence80322.7%52.4%
C90Ruy Lopez, closed (with ...d6)78127.8%52.6%
C11French, Steinitz, Boleslavsky variation75525.8%54.0%
C19French, Winawer, advance, positional main line74723.8%55.3%
C06French, Tarrasch, closed variation, main line73326.7%51.0%
D19QGD Slav, Dutch variation69421.8%58.1%
A00Benko's opening69322.7%51.4%
D97Gruenfeld, Russian, Alekhine (Hungarian) variation67724.4%59.9%
E06Catalan, closed, 5.Nf363628.9%51.4%
A05Reti opening62421.8%51.4%
C09French, Tarrasch, open variation, main line62132.2%56.0%
E60King's Indian, 3.Nf360822.7%55.6%
B46Sicilian, Taimanov variation60723.7%55.5%
D85Gruenfeld, modern exchange variation59830.8%48.5%
E55Nimzo-Indian, 4.e3, Gligoric system, Bronstein variation59727.5%52.4%
D00Queen's pawn, Chigorin variation56720.1%52.7%
A35English, symmetrical, four knights system54928.2%53.5%
D02Queen's bishop game53222.7%50.5%
A15English opening52922.7%53.9%
C00French defence52720.9%56.5%
C08French, Tarrasch, open, 4.ed ed51530.5%50.8%
C10French, Rubinstein variation50325.0%49.1%
B50Sicilian50123.4%54.8%
A06Reti opening50022.4%58.2%
A07Reti, King's Indian attack, Yugoslav variation49127.5%54.9%
B92Sicilian, Najdorf, Opovcensky variation48726.1%51.2%
E12Queen's Indian, 4.Nc348627.0%50.5%
B14Caro-Kann, Panov-Botvinnik attack, 5...e648527.6%52.4%
A22English, Bremen, Smyslov system48428.3%47.6%
D20QGA, 3.e446622.7%56.7%
A45Queen's pawn game46324.8%52.4%
C01French, exchange variation42924.0%54.7%
D38QGD, Ragozin variation41726.9%53.5%
A10English opening41419.3%55.6%
D11QGD Slav, 3.Nf341321.1%54.4%
C43Petrov, modern attack, Symmetrical variation41130.2%51.6%
B48Sicilian, Taimanov variation40226.9%51.7%
D12QGD Slav, 4.e3 Bf540022.5%56.0%
B30Sicilian defence39822.9%51.4%
B97Sicilian, Najdorf, Poisoned pawn variation39719.4%44.2%
D30Queen's gambit declined38525.5%54.0%
E00Catalan opening38027.1%52.2%
B10Caro-Kann defence37723.9%54.6%
E63King's Indian, fianchetto, Panno variation37521.9%53.9%
A50Kevitz-Trajkovich defence37428.6%50.1%
A46Queen's pawn game37322.0%52.8%
C02French, advance variation37119.9%55.5%
C03French, Tarrasch37122.9%53.8%
B45Sicilian, Taimanov variation36325.3%51.0%
A33English, symmetrical, Geller variation34621.4%54.3%
A31English, symmetrical, Benoni formation33920.6%51.9%
D15QGD Slav, 4.Nc333619.6%54.5%
A56Benoni defence, Hromodka system33216.0%59.8%
E68King's Indian, fianchetto, classical variation, 8.e433124.5%53.6%
D05Queen's pawn game32826.5%55.6%
D00Queen's pawn, Mason variation32719.0%53.5%
D27QGA, classical, 6...a632227.6%53.3%
D34QGD, Tarrasch, Prague variation, Normal position31926.3%60.8%
B81Sicilian, Scheveningen, Keres attack31820.4%53.3%
A06Reti, Nimzovich-Larsen attack31722.1%52.4%
D40QGD, Semi-Tarrasch defence30830.8%47.6%
E11Bogo-Indian defence, Nimzovich variation30620.6%58.3%
C19French, Winawer, advance, poisoned pawn, Konstantinopolsky variation30522.0%59.5%
C45Scotch game30122.3%49.3%
D44QGD semi-Slav, anti-Meran gambit30020.3%56.5%
D45QGD semi-Slav, accelerated Meran (Alekhine variation)30022.0%53.3%
C67Ruy Lopez, Berlin defence, open variation29427.6%52.9%
A25English, closed system27926.2%53.9%
E14Queen's Indian, 4.e327723.8%52.3%
B67Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 8...Bd727419.7%50.0%
D04Queen's pawn game27422.3%52.0%
B12Caro-Kann defence27322.0%57.5%
D26QGA, 4...e627126.2%47.8%
C48Four knights, Rubinstein counter-gambit26819.4%57.5%
C42Petrov's defence26522.6%57.0%
D02Queen's pawn game, Chigorin variation26523.8%54.5%
D00Levitsky attack (Queen's bishop attack)26420.8%47.5%
C53Giuoco Piano26321.3%52.9%
B10Caro-Kann, anti-anti-Caro-Kann defence26026.9%53.1%
C05French, Tarrasch, closed variation25820.9%55.8%
C02French, advance, Paulsen attack25417.7%53.3%
B51Sicilian, Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack25225.8%55.0%
C11French, Steinitz variation24719.0%48.4%
B56Sicilian24422.1%55.3%
A13English opening24322.6%49.2%
A45Trompovsky attack (Ruth, Opovcensky opening)24115.8%52.3%
E11Bogo-Indian defence24128.2%49.4%
B30Sicilian, Nimzovich-Rossolimo attack (without ...d6)23920.9%54.4%
C42Petrov, classical attack23526.4%52.8%
A01Nimzovich-Larsen attack, modern variation23024.3%50.9%
C80Ruy Lopez, open, 8...Be622829.4%44.5%
B23Sicilian, closed22722.0%53.3%
A34English, symmetrical, three knights system22524.4%54.4%
C12French, MacCutcheon, Lasker variation, 8...g622418.8%49.6%
A81Dutch defence22324.7%59.9%
C50Giuoco Pianissimo22324.2%49.8%
A22English, Bremen, reverse dragon22230.6%50.9%
A40Queen's pawn22022.3%49.3%
C42Petrov, classical attack, Chigorin variation22030.5%52.0%
D47QGD semi-Slav, neo-Meran (Lundin variation)21926.5%56.6%
A34English, symmetrical variation21818.8%47.5%
A04Reti v Dutch21514.9%62.3%
B01Scandinavian (centre counter) defence21319.2%61.7%
D01Richter-Veresov attack20926.8%48.8%
A21English opening20827.4%53.6%
C10French, Paulsen variation20727.5%56.8%
D00Queen's pawn game20715.9%53.9%
A80Dutch20524.9%52.9%
B06Robatsch (modern) defence20419.1%56.1%
D03Torre attack (Tartakower variation)20423.5%53.9%
A14English, Symmetrical, Keres defence20132.3%57.5%
A33English, symmetrical variation20130.3%55.0%
B18Caro-Kann, classical, 6.h420024.5%59.3%
C14French, classical, Steinitz variation20022.5%55.8%
B89Sicilian, Sozin, 7.Be319816.7%53.8%
C02French, advance, Euwe variation19516.9%50.5%
D11QGD Slav, 4.e319522.6%50.3%
B90Sicilian, Najdorf19122.5%51.6%
D41QGD, Semi-Tarrasch, 5.cd18929.1%55.8%
B49Sicilian, Taimanov variation18821.3%57.4%
D26QGA, classical variation18721.9%54.8%
B03Alekhine's defence18420.1%53.0%
B10Caro-Kann, anti-Caro-Kann defence18219.2%51.9%
E21Nimzo-Indian, three knights variation18119.3%52.8%
B08Pirc, classical system, 5.Be218032.8%59.7%
B13Caro-Kann, Panov-Botvinnik attack18022.8%54.7%
C00French, King's Indian attack18018.9%50.6%
A53Old Indian defence17924.6%49.2%
B27Sicilian, Hungarian variation17617.0%54.5%
D29QGA, classical, 8...Bb717623.9%48.3%
B31Sicilian, Nimzovich-Rossolimo attack (with ...g6, without ...d6)17526.3%56.6%
D13QGD Slav, exchange variation17424.7%52.6%
B76Sicilian, dragon, Yugoslav attack, 7...O-O17225.0%39.8%
C15French, Winawer (Nimzovich) variation17232.6%59.3%
D07QGD, Chigorin defence17219.2%57.8%
D91Gruenfeld, 5.Bg517223.3%54.1%
C47Four knights, Scotch, 4...exd417129.8%50.0%
A00Dunst (Sleipner, Heinrichsen) opening16821.4%51.2%
C16French, Winawer, advance variation16725.1%59.3%
C46Four knights game16722.8%54.5%
D45QGD semi-Slav, 5...Nd716620.5%49.4%
C42Petrov, classical attack, Marshall variation16326.4%53.7%
D10QGD Slav defence16225.3%53.4%
D47QGD semi-Slav, Meran variation16121.1%55.3%
C45Scotch, Schmidt variation16021.9%50.3%
E11Bogo-Indian defence, Gruenfeld variation15925.2%55.3%
A28English, four knights, Marini variation15829.7%53.5%
B20Sicilian defence15822.2%48.4%
C00French defence, Steiner variation15823.4%53.5%
B44Sicilian, Szen (`anti-Taimanov') variation15726.8%55.4%
B63Sicilian, Richter-Rauzer, Rauzer attack, 7...Be715416.9%55.2%
A84Dutch defence15021.3%53.3%
C17French, Winawer, advance, 5.a315022.7%53.3%
C70Ruy Lopez, Classical defence deferred15026.0%52.3%
B97Sicilian, Najdorf, 7...Qb614919.5%44.6%
D39QGD, Ragozin, Vienna variation14927.5%46.0%
D31QGD, semi-Slav, Marshall gambit14817.6%52.0%
E60King's Indian, 3.g314823.6%51.7%
D17QGD Slav, Wiesbaden variation14723.8%50.7%
E19Queen's Indian, old main line, 9.Qxc314721.8%57.1%
B42Sicilian, Kan, 5.Bd314621.2%50.3%
B10Caro-Kann, closed (Breyer) variation14525.5%49.3%
D45QGD semi-Slav, 5.e314422.9%58.0%
A49King's Indian, fianchetto without c414226.8%50.0%
D78Neo-Gruenfeld, 6.O-O c614223.2%53.2%
A48King's Indian, London system14124.8%55.0%
D02Queen's pawn game, Krause variation14126.2%47.2%
E18Queen's Indian, old main line, 7.Nc314126.2%56.4%
A13English opening, Agincourt variation14020.0%42.9%
B01Scandinavian defence14023.6%49.6%
A48King's Indian, East Indian defence13927.3%54.0%
B00King's pawn opening13920.1%52.5%
D73Neo-Gruenfeld, 5.Nf313926.6%52.2%
B18Caro-Kann, classical variation13819.6%52.5%
B23Sicilian, closed, 2...Nc613719.0%50.4%
B43Sicilian, Kan, 5.Nc313727.7%53.3%
A28English, four knights, 4.e313622.8%50.4%
A38English, symmetrical variation13630.1%52.6%
B52Sicilian, Canal-Sokolsky attack, 3...Bd713629.4%50.7%
D46QGD semi-Slav, Chigorin defence13520.7%52.6%
C49Four knights, double Ruy Lopez13036.2%59.6%
C50Giuoco Pianissimo, Italian four knights variation13025.4%55.8%
B13Caro-Kann, exchange variation12920.9%54.7%
C78Ruy Lopez, 5.O-O12824.2%50.4%
A25English, Sicilian reversed12622.2%53.2%
B21Sicilian, Grand Prix attack12623.0%41.7%
B54Sicilian12620.6%50.0%
B83Sicilian, modern Scheveningen12421.0%47.6%
C18French, Winawer, classical variation12121.5%54.5%
C26Vienna, Paulsen-Mieses variation12128.9%52.5%
D31QGD, Charousek (Petrosian) variation12123.1%51.2%
A90Dutch defence12019.2%57.1%
B15Caro-Kann defence12019.2%48.8%
D20Queen's gambit accepted11925.2%48.7%
A48King's Indian, Torre attack11820.3%48.3%
D14QGD Slav, exchange variation, 6.Bf4 Bf511821.2%56.4%
A41Queen's Pawn11613.8%50.0%
B07Pirc defence11524.3%55.7%
C42Petrov, Cozio (Lasker) attack11532.2%50.9%
D10QGD Slav defence, exchange variation11529.6%51.3%
A22English opening11426.3%48.2%
A46Queen's pawn, Torre attack11226.8%51.8%
B40Sicilian, Anderssen variation11123.4%51.4%
E92King's Indian, Petrosian system, Stein variation11024.5%50.5%
C10French, Fort Knox variation10921.1%51.8%
C42Petrov, Nimzovich attack10932.1%47.2%
B76Sicilian, dragon, Yugoslav attack, Rauser variation10820.4%62.0%
C46Four knights, Italian variation10825.9%50.0%
D21QGA, 3.Nf310825.0%57.9%
D92Gruenfeld, 5.Bf410824.1%54.6%
A43Old Benoni defence10720.6%56.1%
C42Petrov, classical attack, Jaenisch variation10728.0%57.0%
D30QGD10728.0%44.9%
E00Queen's pawn game10620.8%50.9%
B57Sicilian, Sozin, Benko variation10521.0%47.6%
C11French defence10518.1%39.5%
E66King's Indian, fianchetto, Yugoslav Panno10521.0%55.2%
E94King's Indian, orthodox variation10526.7%61.9%
B00KP, Nimzovich defence10424.0%57.2%
B80Sicilian, Scheveningen variation10318.4%50.0%
C49Four knights, symmetrical, Metger unpin10326.2%47.1%
D48QGD semi-Slav, Meran10326.2%51.9%
C41Philidor, Improved Hanham variation10114.9%44.1%
C55Two knights defence (Modern bishop's opening)10127.7%54.5%
D35QGD, exchange, positional line10114.9%43.1%
E91King's Indian, 6.Be210121.8%58.4%
A08Reti, King's Indian attack10019.0%47.5%
B11Caro-Kann, Two knights, 3...Bg410019.0%49.5%
B33Sicilian, Pelikan, Chelyabinsk variation9920.2%52.5%
B35Sicilian, accelerated fianchetto, modern variation with Bc49927.3%52.0%
C24Bishop's opening, Berlin defence9919.2%53.0%
E05Catalan, open, classical line9929.3%57.1%
B15Caro-Kann, Gurgenidze system9822.4%55.1%
D85Gruenfeld, exchange variation9825.5%42.3%
E42Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein)9825.5%48.5%
E94King's Indian, orthodox, 7...Nbd79831.6%49.5%
D56QGD, Lasker defence9625.0%49.0%
E61King's Indian defence, 3.Nc39615.6%52.6%
B44Sicilian defence9423.4%43.6%
C88Ruy Lopez, closed, 7...O-O9429.8%47.9%
A07Reti, King's Indian attack9217.4%57.6%
D18QGD Slav, Dutch variation9232.6%53.3%
C00French, Schlechter variation9127.5%50.0%
A01Nimzovich-Larsen attack, classical variation9030.0%40.6%
D52QGD, Cambridge Springs defence, Bogoljubow variation9017.8%52.2%
D97Gruenfeld, Russian, Prins variation9028.9%54.4%
D59QGD, Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd58835.2%54.0%
D25QGA, 4.e38721.8%58.0%
C02French, advance, Steinitz variation8532.9%49.4%
A09Reti, advance variation8417.9%54.2%
A10English, Anglo-Dutch defense8415.5%60.1%
C45Scotch, Mieses variation8428.6%52.4%
C78Ruy Lopez, Moeller defence8426.2%51.2%
A21English, Kramnik-Shirov counterattack8328.9%48.2%
E92King's Indian, Gligoric-Taimanov system8326.5%59.0%
B12Caro-Kann, 3.Nd28219.5%56.1%
B89Sicilian, Velimirovic attack8218.3%43.3%
A37English, symmetrical, Botvinnik system reversed8121.0%51.2%
A40Queen's pawn, Franco-Indian (Keres) defence8134.6%60.5%
B20Sicilian, Steinitz variation8119.8%51.9%
B52Sicilian, Canal-Sokolsky attack, Sokolsky variation8133.3%50.0%
C00French, Chigorin variation8122.2%53.1%
D25QGA, Janowsky-Larsen variation8124.7%50.6%
E62King's Indian, fianchetto, Kavalek (Bronstein) variation8125.9%52.5%
A01Nimzovich-Larsen attack, Indian variation8017.5%51.3%
E87King's Indian, Saemisch, orthodox, 7.d58022.5%62.5%
A28English, four knights, Romanishin variation7929.1%50.0%
A40Modern defence7917.7%57.0%
B28Sicilian, O'Kelly variation7924.1%58.9%
C42Petrov three knights game7920.3%60.8%
D86Gruenfeld, exchange, classical variation7921.5%48.7%
E81King's Indian, Saemisch, 5...O-O7921.5%51.3%
B07Pirc, Ufimtsev-Pytel variation7714.3%56.5%
D42QGD, Semi-Tarrasch, 7.Bd37724.7%50.0%
D79Neo-Gruenfeld, 6.O-O, main line7731.2%50.6%
E90King's Indian, 5.Nf37718.2%51.9%
B36Sicilian, accelerated fianchetto, Maroczy bind7630.3%50.7%
B42Sicilian, Kan, Polugaievsky variation7621.1%46.1%
C02French, advance, Nimzovich system7610.5%46.1%
E09Catalan, closed, main line7628.9%56.6%
B10Caro-Kann, Two knights variation7528.0%55.3%
D30QGD Slav7529.3%48.0%
D30QGD, Hastings variation7522.7%46.0%
E67King's Indian, fianchetto, classical variation7524.0%54.7%
E20Nimzo-Indian, Romanishin-Kasparov (Steiner) system7418.9%43.2%
A39English, symmetrical, main line with d47321.9%54.8%
D31QGD, semi-Slav7324.7%52.1%
E15Queen's Indian, 4.g37316.4%52.1%
B08Pirc, classical (two knights) system7220.8%47.9%
D31QGD, 3.Nc37220.8%53.5%
A26English, Botvinnik system7121.1%47.2%
B54Sicilian, Prins (Moscow) variation7126.8%43.0%
D15QGD Slav, Schlechter variation7126.8%43.0%
D17QGD Slav, Carlsbad variation7131.0%56.3%
D77Neo-Gruenfeld, 6.O-O7132.4%51.4%
E58Nimzo-Indian, 4.e3, main line with 8...Bxc37128.2%49.3%
B53Sicilian, Chekhover variation7035.7%49.3%
C78Ruy Lopez, Archangelsk (counterthrust) variation7032.9%42.1%
D94Gruenfeld, 5.e37025.7%54.3%
A22English, Carls' Bremen system6924.6%38.4%
A41Old Indian, Tartakower (Wade) variation6921.7%54.3%
B24Sicilian, closed6921.7%47.1%
C50King's pawn game6917.4%58.0%
A00Saragossa opening6711.9%47.8%
A13English, Neo-Catalan6720.9%58.2%
A23English, Bremen system, Keres variation6726.9%49.3%
A25English, closed, 5.Rb16723.9%49.3%
A28English, four knights, Nimzovich variation6729.9%61.2%
B38Sicilian, accelerated fianchetto, Maroczy bind, 6.Be36722.4%57.5%
D90Gruenfeld, Three knights variation6725.4%53.0%
B01Scandinavian, Marshall variation6616.7%50.8%
D17QGD Slav, Krause attack6622.7%58.3%
E12Queen's Indian, Miles variation6618.2%53.0%
A28English, four knights system6523.1%65.4%
B33Sicilian defence6429.7%41.4%
C00Lengfellner system6420.3%60.2%
D32QGD, Tarrasch defence6322.2%52.4%
E17Queen's Indian, Opovcensky variation6331.7%69.8%
E20Nimzo-Indian, Kmoch variation6320.6%51.6%
A07Reti, King's Indian attack (with ...c5)6225.8%48.4%
A40Queen's pawn, Keres defence6212.9%59.7%
C41Philidor, exchange variation6219.4%50.0%
C48Four knights, Spanish variation6217.7%50.8%
C65Ruy Lopez, Berlin defence6232.3%58.1%
E15Queen's Indian, 4.g3 Bb76224.2%52.4%
A36English, ultra-symmetrical variation6127.9%51.6%
B34Sicilian, accelerated fianchetto, modern variation6113.1%54.1%
A56Benoni defence6021.7%54.2%
C25Vienna game6018.3%47.5%
D30QGD, Capablanca-Duras variation5916.9%52.5%
D35QGD, exchange, positional line, 5...c65832.8%52.6%
D34QGD, Tarrasch, Prague variation, 9.Bg55724.6%64.9%
D46QGD semi-Slav, Bogolyubov variation5736.8%57.0%
E35Nimzo-Indian, classical, Noa variation, 5.cd ed5724.6%47.4%
A28English, four knights, Capablanca variation5614.3%60.7%
C15French, Winawer, Alekhine (Maroczy) gambit5616.1%59.8%
C26Vienna game5614.3%50.0%
C43Petrov, modern attack, main line5628.6%53.6%
C77Ruy Lopez, Anderssen variation5626.8%43.8%
D35QGD, exchange variation5621.4%42.9%
A01Nimzovich-Larsen attack5518.2%50.9%
A11English, Caro-Kann defensive system5529.1%54.5%
A41Old Indian defence5512.7%59.1%
B88Sicilian, Sozin, Leonhardt variation5527.3%39.1%
C50Giuoco Piano, four knights variation5525.5%56.4%
D47QGD semi-Slav, 7.Bc4559.1%48.2%
A62Benoni, fianchetto variation547.4%66.7%
B93Sicilian, Najdorf, 6.f45422.2%48.1%
C41Philidor's defence5424.1%63.9%
C68Ruy Lopez, exchange variation5429.6%50.0%
B14Caro-Kann, Panov-Botvinnik attack, 5...g65324.5%51.9%
B23Sicilian, Grand Prix attack5317.0%55.7%
D41QGD, Semi-Tarrasch, San Sebastian variation5322.6%67.9%
D66QGD, Orthodox defence, Bd3 line5320.8%55.7%
E00Neo-Indian (Seirawan) attack5317.0%50.0%
A13English, Wimpey system5221.2%51.0%
C00French, Reti (Spielmann) variation5217.3%54.8%
C00St. George defence5219.2%55.8%
C69Ruy Lopez, exchange, Gligoric variation5234.6%53.8%
D34QGD, Tarrasch, Prague variation, 7...Be75213.5%68.3%
D74Neo-Gruenfeld, 6.cd Nxd5, 7.O-O5226.9%55.8%
A15English, 1...Nf6 (Anglo-Indian defense)5123.5%58.8%
A20English, Nimzovich, Flohr variation5113.7%48.0%
A37English, symmetrical variation5119.6%62.7%
A50Queen's pawn game5125.5%57.8%
B06Robatsch defence, Two knights, Suttles variation5129.4%53.9%
B90Sicilian, Najdorf, Lipnitzky attack5125.5%48.0%
C04French, Tarrasch, Guimard main line5117.6%57.8%
C23Bishop's opening5119.6%47.1%
C42Petrov, classical attack, close variation5123.5%62.7%
D52QGD, Cambridge Springs defence, Yugoslav variation5115.7%56.9%
C03French, Tarrasch, Guimard variation5020.0%60.0%
C59Two knights defence5014.0%53.0%
D44QGD semi-Slav, 5.Bg5 dc5026.0%49.0%
A05Reti, King's Indian attack4918.4%58.2%
B21Sicilian, Smith-Morra gambit4914.3%52.0%
B82Sicilian, Scheveningen, 6.f44924.5%49.0%
C88Ruy Lopez, closed4918.4%41.8%
D55QGD, Neo-orthodox variation, 7.Bh44922.4%66.3%
E01Catalan, closed4924.5%51.0%
E39Nimzo-Indian, classical, Pirc variation4926.5%54.1%
B12Caro-Kann, Tartakower (fantasy) variation4829.2%56.3%
B32Sicilian defence4822.9%61.5%
C44Ponziani, Jaenisch counter-attack4843.8%51.0%
E41Nimzo-Indian, e3, Huebner variation4814.6%38.5%
A47Queen's Indian defence4717.0%53.2%
A80Dutch, 2.Bg5 variation4721.3%44.7%
A84Dutch defence, Rubinstein variation4734.0%55.3%
C00French, Labourdonnais variation4714.9%54.3%
C44Scotch gambit, Dubois-Reti defence4734.0%46.8%
C84Ruy Lopez, closed defence4729.8%46.8%
D28QGA, classical, 7...b54725.5%46.8%
D44QGD semi-Slav, Botvinnik system (anti-Meran)4723.4%45.7%
E17Queen's Indian, old main line, 6.O-O4719.1%52.1%
A61Benoni defence4617.4%63.0%
A88Dutch, Leningrad, main variation with c64623.9%42.4%
B01Scandinavian gambit4619.6%40.2%
C19French, Winawer, advance, 6...Ne74626.1%50.0%
C20King's pawn game4619.6%62.0%
D93Gruenfeld with Bf4 e34626.1%54.3%
E16Queen's Indian, Yates variation4628.3%62.0%
C43Petrov, modern (Steinitz) attack4522.2%62.2%
C46Three knights game4517.8%53.3%
E08Catalan, closed, Qc2 & b34517.8%46.7%
D23QGA, Mannheim variation4415.9%55.7%
D61QGD, Orthodox defence, Rubinstein variation4422.7%50.0%
E30Nimzo-Indian, Leningrad variation4413.6%45.5%
E60King's Indian defence4418.2%50.0%
C46Three knights, Steinitz variation4323.3%55.8%
C49Four knights, symmetrical variation4337.2%55.8%
C87Ruy Lopez, closed, Averbach variation4314.0%51.2%
D49QGD semi-Slav, Meran, Blumenfeld variation4316.3%47.7%
E54Nimzo-Indian, 4.e3, Gligoric system with 7...dc4327.9%51.2%
A57Benko gambit4214.3%47.6%
C17French, Winawer, advance, Bogolyubov variation4228.6%52.4%
C97Ruy Lopez, closed, Chigorin defence4219.0%59.5%
D06QGD, Grau (Sahovic) defence4219.0%57.1%
D24QGA, 4.Nc34223.8%57.1%
A02Bird's opening4114.6%48.8%
A09Reti accepted4119.5%65.9%
A35English, symmetrical variation4126.8%59.8%
B75Sicilian, dragon, Yugoslav attack4131.7%50.0%
C50Giuoco Pianissimo, Canal variation4119.5%41.5%
A45Paleface attack4017.5%36.3%
A55Old Indian, main line4020.0%52.5%
C60Ruy Lopez, fianchetto (Smyslov/Barnes) defence4030.0%40.0%
E64King's Indian, fianchetto, Yugoslav system4015.0%60.0%
A03Bird's opening3912.8%44.9%
A46Queen's pawn, Yusupov-Rubinstein system3925.6%61.5%
B80Sicilian, Scheveningen, English variation3920.5%43.6%
C62Ruy Lopez, old Steinitz defence3920.5%46.2%
D55QGD, 6.Nf33917.9%67.9%
B41Sicilian, Kan, Maroczy bind (Reti variation)3821.1%63.2%
C64Ruy Lopez, classical defence, 4.c33826.3%52.6%
C88Ruy Lopez, closed, anti-Marshall 8.a43826.3%50.0%
C96Ruy Lopez, closed (10...c5)3828.9%67.1%
D00Queen's pawn, Mason variation, Steinitz counter-gambit3818.4%43.4%
A42Pterodactyl defence3721.6%51.4%
B98Sicilian, Najdorf variation3718.9%33.8%
C69Ruy Lopez, exchange, Bronstein variation3732.4%45.9%
C79Ruy Lopez, Steinitz defence deferred (Russian defence)3716.2%54.1%
C92Ruy Lopez, closed, Flohr-Zaitsev system (Lenzerheide variation)3737.8%73.0%
D10QGD Slav, Winawer counter-gambit3721.6%56.8%
D46QGD semi-Slav, Romih variation3718.9%63.5%
D98Gruenfeld, Russian, Smyslov variation3721.6%54.1%
E62King's Indian, fianchetto, lesser Simagin (Spassky) variation3716.2%56.8%
E91King's Indian, Kazakh variation3721.6%64.9%
A13English, Neo-Catalan accepted3622.2%66.7%
A52Budapest, Rubinstein variation3622.2%58.3%
C00French, Two knights variation3613.9%54.2%
C12French, MacCutcheon, Lasker variation365.6%58.3%
C48Four knights, Rubinstein counter-gambit, exchange variation3622.2%47.2%
C65Ruy Lopez, Berlin defence, Beverwijk variation3625.0%40.3%
D55QGD, Petrosian variation3641.7%51.4%
E34Nimzo-Indian, classical, Noa variation3638.9%58.3%
E67King's Indian, fianchetto with ...Nd73633.3%50.0%
B09Pirc, Austrian attack3520.0%38.6%
B13Caro-Kann, Panov-Botvinnik, normal variation3525.7%52.9%
B15Caro-Kann, Tartakower (Nimzovich) variation3537.1%55.7%
C43Petrov, modern attack, Trifunovic variation3525.7%47.1%
C69Ruy Lopez, exchange variation, 5.O-O3514.3%47.1%
C92Ruy Lopez, closed, 9.h33522.9%57.1%
D16QGD Slav, Steiner variation3528.6%57.1%
D53QGD, 4.Bg5 Be73537.1%47.1%
E38Nimzo-Indian, classical, 4...c53525.7%55.7%
E41Nimzo-Indian, 4.e3 c53517.1%48.6%
A57Benko gambit half accepted3423.5%50.0%
A70Benoni, classical with e4 and Nf33420.6%57.4%
B00KP, Nimzovich defence, Bogolyubov variation3426.5%48.5%
B07Robatsch defence, Geller's system3420.6%66.2%
B20Sicilian, Keres variation (2.Ne2)3414.7%39.7%
B25Sicilian, closed, 6.f43414.7%42.6%
B33Sicilian, Pelikan (Lasker/Sveshnikov) variation3411.8%58.8%
C28Vienna game348.8%66.2%
C72Ruy Lopez, modern Steinitz defence, 5.O-O3426.5%60.3%
D08QGD, Albin counter-gambit3423.5%41.2%
D80Gruenfeld, Stockholm variation3423.5%41.2%
D87Gruenfeld, exchange, Spassky variation3447.1%58.8%
E07Catalan, closed, Botvinnik variation3414.7%72.1%
E65King's Indian, fianchetto, Yugoslav, 7.O-O3426.5%42.6%
E95King's Indian, orthodox, 7...Nbd7, 8.Re13423.5%44.1%
A07Reti, King's Indian attack, Keres variation3333.3%50.0%
A26English, closed system3315.2%43.9%
B70Sicilian, dragon variation3327.3%53.0%
C02French, advance, Wade variation3333.3%53.0%
C44Scotch, Goering gambit3318.2%48.5%
C45Scotch, Potter variation3321.2%50.0%
C77Ruy Lopez, Morphy defence3318.2%54.5%
D12QGD Slav, exchange variation3327.3%50.0%
D35QGD, 3...Nf63336.4%51.5%
D62QGD, Orthodox defence, 7.Qc2 c5, 8.cd (Rubinstein)3336.4%54.5%
B80Sicilian, Scheveningen, fianchetto variation3218.8%46.9%
C11French, Swiss variation3218.8%43.8%
C48Four knights, Spanish, classical defence3228.1%42.2%
C68Ruy Lopez, exchange, Keres variation3234.4%48.4%
E52Nimzo-Indian, 4.e3, main line with ...b63221.9%48.4%
A52Budapest, Adler variation3129.0%62.9%
A58Benko gambit accepted3119.4%51.6%
B09Pirc, Austrian attack, 6.Bd33119.4%61.3%
B39Sicilian, accelerated fianchetto, Breyer variation3141.9%50.0%
C20Alapin's opening3122.6%46.8%
C85Ruy Lopez, Exchange variation doubly deferred (DERLD)3129.0%53.2%
D25QGA, Smyslov variation3135.5%43.5%
D41QGD, Semi-Tarrasch with e33119.4%48.4%
E62King's Indian, fianchetto variation3132.3%48.4%
A01Nimzovich-Larsen attack, English variation3033.3%43.3%
A87Dutch, Leningrad, main variation3016.7%41.7%
B25Sicilian, closed, 6.f4 e5 (Botvinnik)3023.3%48.3%
B26Sicilian, closed, 6.Be33016.7%55.0%
B91Sicilian, Najdorf, Zagreb (fianchetto) variation3026.7%50.0%
C92Ruy Lopez, closed, Kholmov variation306.7%56.7%
D75Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc33043.3%48.3%
D96Gruenfeld, Russian variation3023.3%55.0%
B04Alekhine's defence, modern, fianchetto variation2924.1%53.4%
B08Pirc, classical, h3 system2927.6%65.5%
B83Sicilian, Scheveningen, 6.Be22941.4%51.7%
C30KGD, classical variation2920.7%55.2%
C64Ruy Lopez, classical defence, Benelux variation 2931.0%50.0%
D35QGD, exchange, Saemisch variation2924.1%63.8%
D76Neo-Gruenfeld, 6.cd Nxd5, 7.O-O Nb62931.0%67.2%
E33Nimzo-Indian, classical, Milner-Barry (Zurich) variation2913.8%65.5%
A27English, three knights system2835.7%46.4%
B41Sicilian, Kan variation2839.3%58.9%
B52Sicilian, Canal-Sokolsky attack, Bronstein gambit2825.0%37.5%
B58Sicilian, Boleslavsky variation2821.4%53.6%
C34KGA, Fischer defence2810.7%33.9%
C60Ruy Lopez, Cozio defence287.1%60.7%
D17QGD Slav, Czech defence2825.0%66.1%
D33QGD, Tarrasch, Prague variation2817.9%51.8%
E62King's Indian, fianchetto, Larsen system2821.4%71.4%
E90King's Indian, Zinnowitz variation2828.6%53.6%
A19English, Mikenas-Carls, Sicilian variation2711.1%42.6%
A36English, symmetrical variation2722.2%44.4%
B04Alekhine's defence, modern variation2718.5%53.7%
C17French, Winawer, advance variation2718.5%50.0%
C27Vienna game2718.5%42.6%
C36KGA, Abbazia defence, modern variation2718.5%38.9%
C47Four knights, Belgrade gambit2711.1%46.3%
C50Giuoco Piano2733.3%72.2%
C76Ruy Lopez, modern Steinitz defence, fianchetto (Bronstein) variation2733.3%53.7%
D09QGD, Albin counter-gambit, 5.g32718.5%57.4%
D26QGA, classical variation, 6.O-O2722.2%40.7%
E25Nimzo-Indian, Saemisch, Keres variation2714.8%40.7%
A01Nimzovich-Larsen attack, symmetrical variation2615.4%57.7%
B60Sicilian, Richter-Rauzer2630.8%46.2%
C47Four knights, Scotch variation2630.8%57.7%
D05Queen's pawn game, Rubinstein (Colle-Zukertort) variation2623.1%73.1%
D48QGD semi-Slav, Meran, Reynolds' variation2611.5%71.2%
E12Queen's Indian defence2642.3%40.4%
A09Reti opening2532.0%64.0%
B01Scandinavian, Pytel-Wade variation2516.0%60.0%
B03Alekhine's defence, exchange variation2516.0%56.0%
B07Pirc, Byrne variation2516.0%52.0%
B07Pirc, Sveshnikov system258.0%64.0%
B23Sicilian, chameleon variation2516.0%40.0%
B95Sicilian, Najdorf, 6...e62540.0%48.0%
C15French, Winawer, Alekhine gambit, Kan variation2512.0%42.0%
C42Petrov, Paulsen attack2520.0%50.0%
C44Scotch, Lolli variation258.0%64.0%
C64Ruy Lopez, classical (Cordel) defence2516.0%64.0%
C89Ruy Lopez, Marshall counter-attack2512.0%50.0%
D15QGD Slav, Slav gambit2528.0%38.0%
D30QGD, Vienna variation2524.0%64.0%
E49Nimzo-Indian, 4.e3, Botvinnik system2528.0%54.0%
A40Queen's pawn, Lundin (Kevitz-Mikenas) defence2416.7%58.3%
A91Dutch defence2433.3%58.3%
A93Dutch, stonewall, Botwinnik variation2416.7%70.8%
A96Dutch, classical variation2416.7%54.2%
B32Sicilian, Labourdonnais-Loewenthal (Kalashnikov) variation2437.5%43.8%
B36Sicilian, accelerated fianchetto, Gurgenidze variation2437.5%52.1%
B37Sicilian, accelerated fianchetto, Maroczy bind, 5...Bg72429.2%47.9%
B96Sicilian, Najdorf, 7.f42429.2%43.8%
C12French, MacCutcheon variation2425.0%58.3%
C22Centre game, Berger variation2420.8%52.1%
C63Ruy Lopez, Schliemann defence, Berger variation2412.5%47.9%
C77Ruy Lopez, four knights (Tarrasch) variation2412.5%64.6%
C86Ruy Lopez, Worrall attack, solid line2437.5%43.8%
D15QGD Slav, 5.e3 (Alekhine variation)2416.7%45.8%
D16QGD Slav accepted, Alapin variation2412.5%64.6%
D97Gruenfeld, Russian, Byrne (Simagin) variation248.3%33.3%
E10Dzindzikhashvili defence2416.7%45.8%
E40Nimzo-Indian, 4.e32416.7%62.5%
E46Nimzo-Indian, Reshevsky variation2429.2%68.8%
B60Sicilian, Richter-Rauzer, Larsen variation2321.7%45.7%
B99Sicilian, Najdorf, 7...Be7 main line2317.4%60.9%
D49QGD semi-Slav, Meran, Sozin variation2313.0%23.9%
E10Blumenfeld counter-gambit2317.4%60.9%
B01Scandinavian, Icelandic gambit2231.8%43.2%
B62Sicilian, Richter-Rauzer, 6...e62222.7%34.1%
C40QP counter-gambit (elephant gambit)2222.7%56.8%
D11QGD Slav, Breyer variation2231.8%43.2%
D31QGD, semi-Slav, Noteboom variation2231.8%43.2%
D44QGD semi-Slav, anti-Meran, Alatortsev system2213.6%61.4%
E16Queen's Indian, Capablanca variation2227.3%63.6%
E17Queen's Indian, anti-Queen's Indian system2231.8%47.7%
E43Nimzo-Indian, Fischer variation2222.7%56.8%
E62King's Indian, fianchetto with ...Nc62222.7%43.2%
E92King's Indian, Andersson variation2218.2%40.9%
E98King's Indian, orthodox, Aronin-Taimanov, 9.Ne12227.3%68.2%
A05Reti, King's Indian attack, Spassky's variation2128.6%61.9%
A85Dutch with c4 & Nc32119.0%61.9%
B04Alekhine's defence, modern, Larsen variation2114.3%40.5%
B09Pirc, Austrian attack, dragon formation2142.9%54.8%
B16Caro-Kann, Bronstein-Larsen variation2123.8%64.3%
B87Sicilian, Sozin with ...a6 and ...b52128.6%61.9%
C12French, MacCutcheon, Janowski variation2119.0%76.2%
C25Vienna, Paulsen variation2138.1%47.6%
C53Giuoco Piano, Bird's attack2123.8%40.5%
C55Two knights defence219.5%52.4%
C60Ruy Lopez (Spanish opening)219.5%52.4%
C77Ruy Lopez, Wormald (Alapin) attack2123.8%59.5%
C84Ruy Lopez, closed, centre attack2128.6%47.6%
E53Nimzo-Indian, 4.e3, main line with ...c52119.0%61.9%
A17English opening2025.0%67.5%
A54Old Indian, Ukrainian variation, 4.Nf32025.0%67.5%
A56Czech Benoni defence2035.0%57.5%
B06Robatsch defence2015.0%62.5%
B29Sicilian, Nimzovich-Rubinstein variation2035.0%47.5%
B72Sicilian, dragon, 6.Be32015.0%47.5%
B94Sicilian, Najdorf, 6.Bg52035.0%57.5%
C16French, Winawer, Petrosian variation2010.0%35.0%
C30King's gambit2015.0%62.5%
C42Petrov, Kaufmann attack2030.0%60.0%
C57Two knights defence, Wilkes Barre (Traxler) variation2015.0%57.5%
C59Two knights defence, Steinitz variation2030.0%60.0%
D10QGD Slav defence, Alekhine variation2020.0%55.0%
D22QGA, Alekhine defence2020.0%45.0%
D63QGD, Orthodox defence, Swiss (Henneberger) variation2025.0%57.5%
E69King's Indian, fianchetto, classical main line2040.0%40.0%
A43Old Benoni, Franco-Benoni defence1910.5%57.9%
A54Old Indian, Ukrainian variation1936.8%71.1%
A60Benoni defence1910.5%47.4%
A83Dutch, Staunton gambit, Staunton's line1915.8%39.5%
B73Sicilian, dragon, classical, 8.O-O1915.8%55.3%
B82Sicilian, Scheveningen, Tal variation1921.1%73.7%
C41Philidor, Hanham, Schlechter variation1926.3%65.8%
C41Philidor, Nimzovich (Jaenisch) variation1931.6%63.2%
C68Ruy Lopez, exchange, Alekhine variation1921.1%47.4%
D05Colle system1931.6%57.9%
E10Blumenfeld counter-gambit, Dus-Chotimursky variation1931.6%52.6%
E71King's Indian, Makagonov system (5.h3)1926.3%39.5%
A16English opening1827.8%47.2%
A25English, closed system (without ...d6)1833.3%44.4%
A32English, symmetrical variation1822.2%50.0%
B61Sicilian, Richter-Rauzer, Larsen variation, 7.Qd2185.6%41.7%
B62Sicilian, Richter-Rauzer, Margate (Alekhine) variation1833.3%55.6%
B63Sicilian, Richter-Rauzer, Rauzer attack1816.7%41.7%
C44Dresden opening1827.8%36.1%
C44Ponziani opening1838.9%41.7%
C47Four knights, Scotch, Krause variation1822.2%72.2%
C57Two knights defence1816.7%30.6%
C66Ruy Lopez, closed Berlin defence, Wolf variation1844.4%50.0%
C80Ruy Lopez, open, Bernstein variation1822.2%55.6%
C86Ruy Lopez, Worrall attack, sharp line1833.3%44.4%
D30QGD, Capablanca variation1811.1%50.0%
D55QGD, Neo-orthodox variation, 7.Bxf61816.7%63.9%
D60QGD, Orthodox defence1816.7%47.2%
D63QGD, Orthodox defence, 7.Rc11833.3%50.0%
E40Nimzo-Indian, 4.e3, Taimanov variation1811.1%38.9%
A10English, Adorjan defence1735.3%47.1%
A21English, Troeger defence1747.1%64.7%
B02Alekhine's defence1711.8%47.1%
B57Sicilian, Sozin, not Scheveningen1723.5%47.1%
C30KGD, Mafia defence1711.8%76.5%
C46Four knights, Gunsberg variation1723.5%58.8%
C61Ruy Lopez, Bird's defence1711.8%58.8%
C80Ruy Lopez, open (Tarrasch) defence1729.4%44.1%
D15QGD Slav, Tolush-Geller gambit1729.4%44.1%
D21QGA, Ericson variation1752.9%44.1%
E15Queen's Indian, Rubinstein variation175.9%50.0%
E48Nimzo-Indian, 4.e3 O-O, 5.Bd3 d51729.4%55.9%
E59Nimzo-Indian, 4.e3, main line175.9%55.9%
E62King's Indian, fianchetto, Uhlmann (Szabo) variation1717.6%61.8%
E94King's Indian, orthodox, Donner variation1717.6%50.0%
A12English, Caro-Kann defensive system1618.8%53.1%
B02Alekhine's defence, Two pawns' (Lasker's) attack1631.3%40.6%
B32Sicilian, Labourdonnais-Loewenthal variation1618.8%78.1%
B80Sicilian, Scheveningen, Vitolins variation166.3%46.9%
C00French, Pelikan variation1625.0%31.3%
C02French, advance, Milner-Barry gambit1625.0%62.5%
C80Ruy Lopez, open, 6.d41631.3%65.6%
C88Ruy Lopez, Trajkovic counter-attack1612.5%37.5%
D24QGA, Bogolyubov variation1618.8%34.4%
D99Gruenfeld defence, Smyslov, main line1631.3%53.1%
E51Nimzo-Indian, 4.e3, Ragozin variation1650.0%43.8%
A01Nimzovich-Larsen attack, Dutch variation1513.3%40.0%
B05Alekhine's defence, modern, Flohr variation1520.0%50.0%
B07Pirc, 150 attack1513.3%73.3%
B27Sicilian, Katalimov variation1513.3%80.0%
C23Bishop's opening, Classical variation1513.3%40.0%
C48Four knights, Rubinstein counter-gambit, Henneberger variation1540.0%60.0%
C56Two knights defence156.7%43.3%
C66Ruy Lopez, Berlin defence, hedgehog variation1540.0%60.0%
C73Ruy Lopez, modern Steinitz defence, Alapin variation1533.3%36.7%
C89Ruy Lopez, Marshall counter-attack, 11...c61540.0%33.3%
D05Queen's pawn game, Zukertort variation1520.0%56.7%
D07QGD, Chigorin defence, Janowski variation1520.0%63.3%
D31QGD, semi-Slav, Abrahams variation1533.3%56.7%
D52QGD1526.7%66.7%
D80Gruenfeld defence1546.7%56.7%
D88Gruenfeld, Spassky variation, main line, 10...cd, 11.cd1546.7%56.7%
E44Nimzo-Indian, Fischer variation, 5.Ne21520.0%56.7%
E56Nimzo-Indian, 4.e3, main line with 7...Nc61513.3%40.0%
E70King's Indian, 4.e41540.0%46.7%
E73King's Indian, Averbakh system1526.7%40.0%
A51Budapest, Fajarowicz variation1414.3%78.6%
A82Dutch, Staunton gambit1428.6%35.7%
A89Dutch, Leningrad, main variation with Nc61428.6%42.9%
B05Alekhine's defence, modern variation, 4...Bg41442.9%64.3%
B65Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9...Nxd41414.3%50.0%
B74Sicilian, dragon, classical, 9.Nb31421.4%53.6%
B86Sicilian, Sozin attack1414.3%28.6%
C01French, exchange, Svenonius variation1435.7%75.0%
C19French, Winawer, advance, Smyslov variation140.0%50.0%
C27Boden-Kieseritsky gambit140.0%50.0%
C39KGA, Kieseritsky, Berlin defence, 6.Bc41414.3%50.0%
C41Philidor, Nimzovich, Rellstab variation1435.7%75.0%
C50Hungarian defence1450.0%46.4%
C54Giuoco Piano1414.3%42.9%
D28QGA, classical, 7.Qe21428.6%28.6%
D40QGD, Semi-Tarrasch, symmetrical variation1414.3%28.6%
D63QGD, Orthodox defence, Swiss, Karlsbad variation147.1%39.3%
D90Gruenfeld, Flohr variation1421.4%60.7%
E07Catalan, closed, 6...Nbd71428.6%50.0%
E10Blumenfeld counter-gambit accepted1421.4%39.3%
E47Nimzo-Indian, 4.e3 O-O, 5.Bd31457.1%50.0%
E51Nimzo-Indian, 4.e3 e8g8, 5.Nf3 d7d51428.6%42.9%
A13English, Kurajica defence1315.4%53.8%
A45Blackmar-Diemer gambit1323.1%50.0%
A61Benoni, Nimzovich (knight's tour) variation130.0%69.2%
A86Dutch with c4 & g31315.4%69.2%
B32Sicilian, Flohr variation137.7%73.1%
C33KGA, bishop's gambit, Jaenisch variation1315.4%46.2%
C42Petrov, Italian variation1330.8%53.8%
C45Scotch, Horwitz attack1323.1%42.3%
C71Ruy Lopez, modern Steinitz defence, Duras (Keres) variation1323.1%57.7%
C80Ruy Lopez, open, Riga variation1330.8%53.8%
D27QGA, classical, Geller variation1323.1%42.3%
D29QGA, classical, Smyslov variation1323.1%57.7%
D46QGD semi-Slav, 6.Bd31330.8%61.5%
D70Neo-Gruenfeld defence1315.4%61.5%
D82Gruenfeld, 4.Bf41330.8%61.5%
D94Gruenfeld, Smyslov defence1323.1%42.3%
E25Nimzo-Indian, Saemisch variation1315.4%61.5%
E76King's Indian, Four pawns attack1323.1%57.7%
A36English, symmetrical, Botvinnik system reversed1241.7%37.5%
B09Pirc, Austrian attack, 6.Be3120.0%66.7%
B13Caro-Kann, exchange, Rubinstein variation1241.7%54.2%
B15Caro-Kann, Forgacs variation1241.7%54.2%
B19Caro-Kann, classical, 7...Nd71225.0%54.2%
B25Sicilian, closed1225.0%54.2%
B42Sicilian, Kan, Swiss cheese variation1225.0%79.2%
B44Sicilian, Szen, hedgehog variation1233.3%66.7%
B58Sicilian, classical1241.7%45.8%
B85Sicilian, Scheveningen, classical1241.7%45.8%
B85Sicilian, Scheveningen, classical main line1225.0%54.2%
C10French, Frere (Becker) variation1216.7%58.3%
C13French, Albin-Alekhine-Chatard attack1216.7%66.7%
C17French, Winawer, advance, Russian variation128.3%54.2%
C20KP, Indian opening1216.7%25.0%
C25Vienna game, Max Lange defence1233.3%50.0%
C29Vienna gambit1216.7%58.3%
C49Four knights1216.7%58.3%
C70Ruy Lopez1225.0%37.5%
C70Ruy Lopez, Schliemann defence deferred128.3%45.8%
C89Ruy Lopez, Marshall, main line, 12.d2d41216.7%41.7%
D31QGD, Alapin variation128.3%29.2%
D33QGD, Tarrasch, Folkestone (Swedish) variation120.0%58.3%
D56QGD, Lasker defence, Teichmann variation1225.0%79.2%
E20Nimzo-Indian defence1225.0%62.5%
E24Nimzo-Indian, Saemisch variation1225.0%37.5%
E86King's Indian, Saemisch, orthodox, 7.Nge2 c61216.7%66.7%
E90King's Indian, Larsen variation1216.7%50.0%
A28English, Bradley Beach variation1127.3%40.9%
B02Alekhine's defence, Saemisch attack110.0%63.6%
B02Alekhine's defence, Scandinavian variation1118.2%54.5%
B06Robatsch defence, Pseudo-Austrian attack1127.3%59.1%
B06Robatsch defence, Two knights variation1136.4%54.5%
B12Caro-Kann, advance, Short variation1136.4%63.6%
B13Caro-Kann, Panov-Botvinnik, Czerniak variation1181.8%59.1%
B83Sicilian, modern Scheveningen, main line1127.3%68.2%
C44Ponziani counter-gambit119.1%22.7%
C44Scotch, Relfsson gambit ('MacLopez')1118.2%36.4%
C45Scotch, Steinitz variation1118.2%72.7%
C51Evans gambit, Cordel variation1118.2%45.5%
C58Two knights defence119.1%59.1%
C63Ruy Lopez, Schliemann defence1145.5%68.2%
C74Ruy Lopez, modern Steinitz defence1154.5%54.5%
C75Ruy Lopez, modern Steinitz defence1127.3%68.2%
D16QGD Slav, Soultanbeieff variation1127.3%50.0%
D20QGA, Linares variation1118.2%45.5%
D50QGD, 4.Bg51136.4%63.6%
D97Gruenfeld, Russian, Szabo (Boleslavsky) variation119.1%59.1%
E22Nimzo-Indian, Spielmann variation1118.2%36.4%
E60King's Indian, Anti-Gruenfeld1127.3%68.2%
E80King's Indian, Saemisch variation119.1%50.0%
A08Reti, King's Indian attack, French variation1010.0%35.0%
A17English, Nimzo-English opening1010.0%55.0%
A20English, Nimzovich variation100.0%60.0%
A28English, four knights, Stean variation1020.0%60.0%
A38English, symmetrical, main line with d31030.0%45.0%
A41Robatsch defence, Rossolimo variation1020.0%70.0%
A76Benoni, classical, 9...Re8100.0%60.0%
A92Dutch, stonewall variation100.0%80.0%
A99Dutch, Ilyin-Genevsky variation with b3100.0%60.0%
B12Caro-Masi defence1020.0%50.0%
B62Sicilian, Richter-Rauzer, Keres variation1030.0%55.0%
C13French, Albin-Alekhine-Chatard attack, Spielmann variation1050.0%65.0%
C14French, classical variation1020.0%30.0%
C22Centre game1040.0%70.0%
C34KGA, Schallop defence1020.0%50.0%
C44Scotch gambit, Benima defence1030.0%85.0%
C60Ruy Lopez, Cozio defence, Paulsen variation1050.0%55.0%
C62Ruy Lopez, old Steinitz defence, Nimzovich attack1010.0%55.0%
C65Ruy Lopez, Berlin defence, 4.O-O1020.0%70.0%
C66Ruy Lopez, Berlin defence, 4.O-O, d61010.0%55.0%
C70Ruy Lopez, Taimanov (chase/wing/accelerated counterthrust) variation1020.0%50.0%
C82Ruy Lopez, open, Italian variation1020.0%70.0%
D36QGD, exchange, positional line, 6.Qc21030.0%45.0%
D44QGD semi-Slav, anti-Meran, Szabo variation1010.0%35.0%
D60QGD, Orthodox defence, Botvinnik variation1020.0%40.0%
D63QGD, Orthodox defence1020.0%60.0%
D64QGD, Orthodox defence, Rubinstein attack (with Rc1)1030.0%45.0%
D97Gruenfeld, Russian variation with e41060.0%60.0%
E83King's Indian, Saemisch, 6...Nc6100.0%50.0%
A18English, Mikenas-Carls, Kevitz variation90.0%55.6%
A51Budapest defence declined933.3%72.2%
B02Alekhine's defence, Maroczy variation944.4%55.6%
B42Sicilian, Kan, Gipslis variation933.3%61.1%
B68Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 9...Be7911.1%38.9%
C29Vienna gambit, Breyer variation90.0%66.7%
C33KGA, bishop's gambit, Bogolyubov variation911.1%61.1%
C41Philidor, Larsen variation933.3%83.3%
C42Petrov, Cochrane gambit911.1%38.9%
C44Scotch opening90.0%33.3%
C46Four knights, Schultze-Mueller gambit944.4%44.4%
C48Four knights, Ranken variation944.4%33.3%
C49Four knights, Nimzovich (Paulsen) variation944.4%55.6%
C49Four knights, symmetrical, Pillsbury variation922.2%44.4%
C57Two knights defence, Ulvestad variation922.2%44.4%
C67Ruy Lopez, open Berlin defence, l'Hermet variation922.2%55.6%
C73Ruy Lopez, modern Steinitz defence, Richter variation944.4%55.6%
C74Ruy Lopez, Siesta, Kopayev variation922.2%33.3%
D12QGD Slav, Amsterdam variation944.4%44.4%
D19QGD Slav, Dutch variation, main line933.3%72.2%
D50QGD, Semi-Tarrasch, Primitive Pillsbury variation911.1%16.7%
E13Queen's Indian, 4.Nc3, main line933.3%61.1%
E33Nimzo-Indian, classical, 4...Nc6933.3%50.0%
E53Nimzo-Indian, 4.e3, Keres variation922.2%44.4%
E62King's Indian, fianchetto, Simagin variation922.2%88.9%
A02Bird's opening, Swiss gambit812.5%56.3%
A44Semi-Benoni (`blockade variation')812.5%31.3%
A61Benoni, Uhlmann variation825.0%62.5%
A92Dutch, stonewall with Nc3812.5%43.8%
B04Alekhine's defence, modern, Schmid variation80.0%75.0%
B18Caro-Kann, classical, Flohr variation80.0%62.5%
B23Sicilian, closed, Korchnoi variation825.0%37.5%
B33Sicilian, Pelikan, Bird variation837.5%56.3%
B40Sicilian, Marshall variation812.5%43.8%
B45Sicilian, Taimanov, American attack837.5%31.3%
B55Sicilian, Prins variation, Venice attack812.5%43.8%
B77Sicilian, dragon, Yugoslav attack, 9.Bc4812.5%56.3%
C33KGA, Carrera (Basman) gambit837.5%18.8%
C34KGA, Becker defence80.0%25.0%
C45Scotch, Pulling counter-attack825.0%37.5%
C51Evans gambit declined, 5.a480.0%50.0%
C65Ruy Lopez, Berlin defence, Nyholm attack837.5%81.3%
C82Ruy Lopez, open, St. Petersburg variation862.5%56.3%
D14QGD Slav, exchange, Trifunovic variation825.0%62.5%
D51QGD, 4.Bg5 Nbd7825.0%25.0%
D52QGD, Cambridge Springs defence825.0%62.5%
D57QGD, Lasker defence, main line825.0%50.0%
D66QGD, Orthodox defence, Bd3 line, fianchetto variation812.5%68.8%
D94Gruenfeld, Makogonov variation825.0%37.5%
D94Gruenfeld, Opovcensky variation812.5%43.8%
E29Nimzo-Indian, Saemisch, main line825.0%37.5%
E32Nimzo-Indian, classical, Adorjan gambit825.0%62.5%
E45Nimzo-Indian, 4.e3, Bronstein (Byrne) variation825.0%50.0%
E61King's Indian, Smyslov system837.5%43.8%
E70King's Indian, accelerated Averbakh system837.5%43.8%
E84King's Indian, Saemisch, Panno main line850.0%50.0%
E92King's Indian, Petrosian system812.5%43.8%
A25English, closed, Hort variation742.9%50.0%
A42Modern defence, Averbakh system714.3%64.3%
A83Dutch, Staunton gambit, Chigorin variation728.6%71.4%
A90Dutch defence, Dutch-Indian (Nimzo-Dutch) variation714.3%78.6%
A97Dutch, Ilyin-Genevsky variation728.6%71.4%
B12Caro-Kann, Edinburgh variation70.0%85.7%
B33Sicilian, Sveshnikov variation728.6%42.9%
B34Sicilian, accelerated fianchetto, exchange variation714.3%64.3%
B58Sicilian, Boleslavsky, Louma variation714.3%50.0%
C05French, Tarrasch, Botvinnik variation714.3%78.6%
C13French, Albin-Alekhine-Chatard attack, Breyer variation742.9%64.3%
C18French, Winawer, advance variation714.3%35.7%
C22Centre game, Paulsen attack70.0%57.1%
C33KGA, bishop's gambit, Bledow variation728.6%28.6%
C41Philidor, Hanham, Krause variation757.1%57.1%
C43Petrov, Urusov gambit70.0%28.6%
C44Inverted Hungarian728.6%28.6%
C44Scotch gambit714.3%35.7%
C51Evans gambit, normal variation714.3%50.0%
C52Evans gambit728.6%42.9%
C53Giuoco Piano, LaBourdonnais variation742.9%50.0%
C86Ruy Lopez, Worrall attack728.6%57.1%
D01Richter-Veresov attack, Richter variation70.0%42.9%
D15QGD Slav accepted714.3%64.3%
D25QGA, Flohr variation728.6%71.4%
D40QGD, Semi-Tarrasch defence, Pillsbury variation757.1%42.9%
D52QGD, Cambridge Springs defence, Rubinstein variation714.3%64.3%
D70Neo-Gruenfeld (Kemeri) defence728.6%57.1%
E31Nimzo-Indian, Leningrad, main line714.3%64.3%
E76King's Indian, Four pawns attack, dynamic line728.6%57.1%
E83King's Indian, Saemisch, Panno formation70.0%42.9%
E88King's Indian, Saemisch, orthodox, 7.d5 c6742.9%64.3%
A00Lasker simul special616.7%58.3%
A06Reti, old Indian attack60.0%16.7%
A12English, Capablanca's variation60.0%33.3%
A12English, London defensive system616.7%25.0%
A21English, Keres variation666.7%50.0%
A24English, Bremen system with ...g6616.7%58.3%
A61Benoni, fianchetto variation633.3%33.3%
B13Caro-Kann, Panov-Botvinnik, Herzog defence616.7%41.7%
B15Caro-Kann, Alekhine gambit616.7%58.3%
B44Sicilian, Szen variation, Dely-Kasparov gambit633.3%50.0%
B56Sicilian, Venice attack616.7%75.0%
B57Sicilian, Magnus Smith trap60.0%66.7%
B60Sicilian, Richter-Rauzer, Bondarevsky variation616.7%58.3%
C00French, Reversed Philidor formation60.0%33.3%
C12French, MacCutcheon, Dr. Olland (Dutch) variation616.7%41.7%
C13French, classical, Anderssen variation60.0%33.3%
C23Bishop's opening, Philidor variation633.3%50.0%
C24Bishop's opening, Ponziani gambit616.7%75.0%
C25Vienna, Pierce gambit60.0%16.7%
C26Vienna, Mengarini variation616.7%91.7%
C31KGD, Falkbeer counter-gambit616.7%41.7%
C33KGA, bishop's gambit60.0%33.3%
C35KGA, Cunningham defence60.0%16.7%
C41Philidor, Boden variation616.7%58.3%
C44Inverted Hanham633.3%16.7%
C44Ponziani, Caro variation616.7%41.7%
C49Four knights, symmetrical, Maroczy system633.3%50.0%
C58Two knights defence, Kieseritsky variation650.0%58.3%
C67Ruy Lopez, open Berlin defence, 5...Be7650.0%58.3%
C68Ruy Lopez, exchange, Romanovsky variation616.7%25.0%
C77Ruy Lopez, Morphy defence, Duras variation666.7%50.0%
C80Ruy Lopez, open, 7.Bb3633.3%16.7%
C83Ruy Lopez, open, classical defence633.3%50.0%
C96Ruy Lopez, closed (8...Na5)650.0%58.3%
D01Richter-Veresov attack, Veresov variation650.0%58.3%
D16QGD Slav, Smyslov variation616.7%41.7%
D21QGA, Alekhine defense, Borisenko-Furman variation633.3%50.0%
D45QGD semi-Slav, Rubinstein (anti-Meran) system650.0%58.3%
E02Catalan, open, 5.Qa4650.0%41.7%
E17Queen's Indian, 5.Bg2 Be760.0%50.0%
E25Nimzo-Indian, Saemisch, Romanovsky variation616.7%41.7%
E60Queen's pawn, Mengarini attack616.7%75.0%
E70King's Indian, Kramer system616.7%58.3%
E73King's Indian, 5.Be2616.7%58.3%
A12English, New York (London) defensive system50.0%40.0%
A13English, Romanishin gambit520.0%90.0%
A14English, Neo-Catalan declined520.0%30.0%
A16English, Anglo-Gruenfeld defense540.0%40.0%
A18English, Mikenas-Carls, Flohr variation520.0%70.0%
A34English, symmetrical, Rubinstein system560.0%70.0%
A36English, symmetrical, Botvinnik system540.0%60.0%
A53Old Indian, Janowski variation520.0%70.0%
A58Benko gambit, fianchetto variation520.0%70.0%
A65Benoni, 6.e4540.0%40.0%
A73Benoni, classical, 9.O-O50.0%40.0%
A90Dutch-Indian, Alekhine variation560.0%70.0%
A94Dutch, stonewall with Ba3560.0%30.0%
B09Pirc, Austrian attack, 6.e550.0%60.0%
B25Sicilian, closed, 6.Ne2 e5 (Botvinnik)50.0%60.0%
B71Sicilian, dragon, Levenfish variation50.0%40.0%
B72Sicilian, dragon, classical attack540.0%60.0%
B98Sicilian, Najdorf, 7...Be750.0%40.0%
C24Bishop's opening, Urusov gambit, Panov variation520.0%50.0%
C26Vienna, Falkbeer variation520.0%70.0%
C27Vienna, Alekhine variation520.0%50.0%
C31KGD, Nimzovich counter-gambit50.0%60.0%
C33KGA, Breyer gambit520.0%10.0%
C33KGA, Lesser bishop's (Petroff-Jaenisch-Tartakower) gambit520.0%70.0%
C34King's knight's gambit50.0%20.0%
C37KGA, Blachly gambit520.0%70.0%
C37KGA, Quaade gambit50.0%0.0%
C41Philidor, Nimzovich variation520.0%70.0%
C41Philidor, Steinitz variation520.0%70.0%
C43Petrov, modern attack, Bardeleben variation540.0%60.0%
C48Four knights, Rubinstein counter-gambit, 5.Be2520.0%50.0%
C52Evans gambit, Tartakower attack50.0%60.0%
C55Two knights defence, Perreux variation50.0%80.0%
C57Two knights defence, Fegatello attack520.0%30.0%
C57Two knights defence, Lolli attack560.0%70.0%
C57Two knights defence, Pincus variation560.0%70.0%
C69Ruy Lopez, exchange variation, Alapin gambit50.0%60.0%
C70Ruy Lopez, Caro variation520.0%70.0%
C71Ruy Lopez, modern Steinitz defence540.0%40.0%
C77Ruy Lopez, Treybal (Bayreuth) variation (exchange var. deferred)560.0%70.0%
C81Ruy Lopez, open, Howell attack50.0%80.0%
C90Ruy Lopez, closed, Suetin variation520.0%90.0%
C92Ruy Lopez, closed, Keres (9...a5) variation50.0%40.0%
C96Ruy Lopez, closed, Borisenko defence540.0%40.0%
D30QGD Slav, Semmering variation50.0%60.0%
D33QGD, Tarrasch, Schlechter-Rubinstein system520.0%50.0%
D48QGD semi-Slav, Meran, Pirc variation540.0%60.0%
D52QGD, Cambridge Springs defence, Argentine variation520.0%50.0%
D59QGD, Tartakower variation520.0%30.0%
D65QGD, Orthodox defence, Rubinstein attack, main line520.0%30.0%
D75Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.dc540.0%60.0%
E15Queen's Indian, Buerger variation50.0%20.0%
E26Nimzo-Indian, Saemisch variation520.0%50.0%
E36Nimzo-Indian, classical, Noa variation, 5.a3540.0%40.0%
E72King's Indian with e4 & g350.0%20.0%
A00Benko's opening, reversed Alekhine425.0%12.5%
A09Reti accepted, Keres variation425.0%62.5%
A28English, Nenarokov variation40.0%75.0%
A52Budapest defence40.0%100.0%
A52Budapest, Alekhine, Abonyi variation425.0%87.5%
A56Czech Benoni, King's Indian system425.0%87.5%
A57Benko gambit, Zaitsev system425.0%37.5%
A72Benoni, classical without 9.O-O40.0%75.0%
A86Dutch, Leningrad variation425.0%87.5%
A97Dutch, Ilyin-Genevsky, Winter variation40.0%75.0%
B02Alekhine's defence, Brooklyn defence475.0%62.5%
B03Alekhine's defence, four pawns attack40.0%50.0%
B04Alekhine's defence, modern, Keres variation40.0%100.0%
B06Robatsch defence, Gurgenidze variation450.0%75.0%
B10Caro-Kann, Goldman (Spielmann) variation425.0%37.5%
B29Sicilian, Nimzovich-Rubinstein; Rubinstein counter-gambit425.0%37.5%
B53Sicilian, Chekhover, Zaitsev variation425.0%37.5%
B62Sicilian, Richter-Rauzer, Podvebrady variation425.0%37.5%
B72Sicilian, dragon, classical, Amsterdam variation40.0%25.0%
B84Sicilian, Scheveningen, classical, Nd7 system40.0%25.0%
C13French, Albin-Alekhine-Chatard attack, Maroczy variation475.0%37.5%
C21Centre game425.0%62.5%
C24Bishop's opening, Urusov gambit425.0%37.5%
C29Vienna gambit, Paulsen attack425.0%37.5%
C33KGA, Villemson (Steinitz) gambit425.0%12.5%
C33KGA, bishop's gambit, Paulsen attack425.0%37.5%
C35KGA, Cunningham, Euwe defence40.0%25.0%
C41Philidor, Hanham variation450.0%25.0%
C42Petrov, Damiano variation450.0%75.0%
C42Petrov, French attack40.0%25.0%
C42Petrov, classical attack, Mason variation450.0%50.0%
C43Petrov, modern attack, Steinitz variation425.0%37.5%
C44Ponziani, Steinitz variation40.0%100.0%
C45Scotch, Blackburne attack425.0%37.5%
C45Scotch, Romanishin variation425.0%62.5%
C49Four knights, Janowski variation425.0%37.5%
C53Giuoco Piano, close variation40.0%50.0%
C58Two knights defence, Bogolyubov variation40.0%25.0%
C58Two knights defence, Paoli variation425.0%62.5%
C61Ruy Lopez, Bird's defence, Paulsen variation40.0%25.0%
C66Ruy Lopez, closed Berlin defence, Showalter variation450.0%75.0%
C93Ruy Lopez, closed, Smyslov defence40.0%75.0%
D06QGD, Marshall defence40.0%50.0%
D22QGA, Haberditz variation40.0%75.0%
D41QGD, Semi-Tarrasch, Kmoch variation425.0%87.5%
D48QGD semi-Slav, Meran, old main line40.0%100.0%
D52QGD, Cambridge Springs defence, Capablanca variation475.0%62.5%
D71Neo-Gruenfeld, 5.cd475.0%37.5%
D81Gruenfeld, Russian variation450.0%50.0%
D95Gruenfeld, Botvinnik variation425.0%62.5%
E16Queen's Indian, Riumin variation425.0%62.5%
E26Nimzo-Indian, Saemisch, O'Kelly variation450.0%50.0%
E27Nimzo-Indian, Saemisch variation450.0%25.0%
E46Nimzo-Indian, 4.e3 O-O425.0%37.5%
E54Nimzo-Indian, 4.e3, Gligoric system, Smyslov variation40.0%25.0%
E77King's Indian, Four pawns attack425.0%62.5%
E93King's Indian, Petrosian system, main line425.0%62.5%
A00Amsterdam attack333.3%83.3%
A12English, Bled variation333.3%50.0%
A12English, Torre defensive system333.3%50.0%
A17English, Queens Indian, Romanishin variation366.7%66.7%
A50Queen's Indian accelerated30.0%66.7%
A63Benoni, fianchetto, 9...Nbd7333.3%50.0%
A69Benoni, four pawns attack, main line30.0%33.3%
A80Dutch, Spielmann gambit333.3%16.7%
B02Alekhine's defence, Mokele Mbembe (Buecker) variation333.3%50.0%
B03Alekhine's defence, four pawns attack, 7.Be3333.3%50.0%
B03Alekhine's defence, four pawns attack, Trifunovic variation30.0%0.0%
B07Pirc, Holmov system366.7%66.7%
B07Pirc, bayonet (Mariotti) attack30.0%33.3%
B22Sicilian, 2.c3, Heidenfeld variation333.3%83.3%
B27Sicilian, Acton extension333.3%16.7%
B40Sicilian, Pin, Koch variation333.3%50.0%
B59Sicilian, Boleslavsky variation, 7.Nb3333.3%50.0%
B73Sicilian, dragon, classical, Richter variation333.3%83.3%
C13French, classical, Frankfurt variation333.3%83.3%
C14French, classical, Pollock variation30.0%33.3%
C14French, classical, Rubinstein variation30.0%100.0%
C21Danish gambit, Soerensen defence30.0%100.0%
C25Vienna gambit30.0%33.3%
C25Vienna, Steinitz gambit, Fraser-Minckwitz variation30.0%0.0%
C30KGD, classical, 4.c330.0%66.7%
C30KGD, classical, Soldatenkov variation30.0%66.7%
C34KGA, Bonsch-Osmolovsky variation30.0%66.7%
C36KGA, Abbazia defence (classical defence, modern defence[!])30.0%66.7%
C39KGA, Kieseritsky, Kolisch defence333.3%83.3%
C41Philidor, Nimzovich, Klein variation30.0%66.7%
C41Philidor, Philidor counter-gambit, Zukertort variation30.0%100.0%
C45Scotch, Meitner variation30.0%33.3%
C48Four knights, Bardeleben variation30.0%66.7%
C48Four knights, Marshall variation333.3%50.0%
C49Four knights, symmetrical, Tarrasch variation366.7%66.7%
C51Evans gambit declined, Cordel variation366.7%33.3%
C55Two knights, Max Lange attack, Schlechter variation30.0%66.7%
C56Two knights defence, Canal variation30.0%33.3%
C67Ruy Lopez, Berlin defence, Winawer attack3100.0%50.0%
C74Ruy Lopez, modern Steinitz defence, siesta variation366.7%33.3%
C75Ruy Lopez, modern Steinitz defence, Rubinstein variation3100.0%50.0%
C79Ruy Lopez, Steinitz defence deferred, Lipnitsky variation333.3%50.0%
C80Ruy Lopez, open, Tartakower variation30.0%33.3%
C82Ruy Lopez, open, Motzko attack30.0%100.0%
D08QGD, Albin counter-gambit, Alapin variation30.0%33.3%
D22QGA, Alekhine defence, Alatortsev variation333.3%50.0%
D31QGD, Janowski variation333.3%50.0%
D32QGD, Tarrasch defence, Marshall gambit366.7%66.7%
D35QGD, Harrwitz attack30.0%33.3%
D43QGD semi-Slav, Hastings variation30.0%0.0%
D51QGD, Alekhine variation30.0%33.3%
D52QGD, Cambridge Springs defence, 7.cd333.3%83.3%
D64QGD, Orthodox defence, Rubinstein attack, Karlsbad variation333.3%50.0%
D72Neo-Gruenfeld, 5.cd, main line30.0%0.0%
D98Gruenfeld, Russian, Keres variation30.0%66.7%
E17Queen's Indian, Euwe variation333.3%50.0%
E21Nimzo-Indian, three knights, Korchnoi variation30.0%66.7%
E28Nimzo-Indian, Saemisch variation333.3%16.7%
E37Nimzo-Indian, classical, Noa variation, main line, 7.Qc230.0%66.7%
E46Nimzo-Indian, Simagin variation30.0%33.3%
E50Nimzo-Indian, 4.e3 e8g8, 5.Nf3, without ...d530.0%66.7%
E74King's Indian, Averbakh, 6...c530.0%33.3%
E81King's Indian, Saemisch, Byrne variation30.0%33.3%
E85King's Indian, Saemisch, orthodox variation333.3%50.0%
E89King's Indian, Saemisch, orthodox main line333.3%83.3%
E97King's Indian, orthodox, Aronin-Taimanov, bayonet attack30.0%33.3%
A03Bird's opening, Lasker variation250.0%75.0%
A04Reti, Pirc-Lisitsin gambit20.0%100.0%
A17English, Queens Indian formation20.0%50.0%
A21English, Smyslov defence20.0%100.0%
A43Old Benoni, Schmid's system250.0%25.0%
A52Budapest, Alekhine variation250.0%25.0%
A67Benoni, Taimanov variation20.0%50.0%
A80Dutch, Manhattan (Alapin, Ulvestad) variation20.0%50.0%
A92Dutch defence20.0%50.0%
A95Dutch, stonewall with Nc32100.0%50.0%
A98Dutch, Ilyin-Genevsky variation with Qc220.0%0.0%
B00KP, Nimzovich defence, Marshall gambit20.0%50.0%
B01Scandinavian defence, Gruenfeld variation20.0%50.0%
B01Scandinavian defence, Lasker variation20.0%50.0%
B01Scandinavian, Richter variation20.0%50.0%
B03Alekhine's defence, O'Sullivan gambit20.0%50.0%
B03Alekhine's defence, four pawns attack, Planinc variation20.0%100.0%
B15Caro-Kann, Gurgenidze counter-attack20.0%100.0%
B40Sicilian, Pin variation (Sicilian counter-attack)20.0%50.0%
B64Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9.f420.0%100.0%
B72Sicilian, dragon, classical, Grigoriev variation250.0%75.0%
B74Sicilian, dragon, classical, Reti-Tartakower variation250.0%75.0%
B90Sicilian, Najdorf, Adams attack20.0%50.0%
B96Sicilian, Najdorf, Polugayevsky variation20.0%0.0%
B96Sicilian, Najdorf, Polugayevsky, Simagin variation20.0%50.0%
C02French, advance, Nimzovich variation20.0%0.0%
C06French, Tarrasch, Leningrad variation20.0%100.0%
C13French, classical20.0%50.0%
C13French, classical, Anderssen-Richter variation20.0%50.0%
C14French, classical, Alapin variation20.0%50.0%
C14French, classical, Tarrasch variation20.0%100.0%
C17French, Winawer, advance, Rauzer variation250.0%25.0%
C21Danish gambit250.0%75.0%
C21Danish gambit, Collijn defence20.0%0.0%
C21Halasz gambit250.0%75.0%
C22Centre game, Charousek variation20.0%100.0%
C23Bishop's opening, Lewis gambit250.0%25.0%
C32KGD, Falkbeer, main line, 7...Bf5250.0%25.0%
C33KGA, bishop's gambit, Boden defence250.0%75.0%
C33KGA, bishop's gambit, Lopez-Gianutio counter-gambit20.0%0.0%
C33KGA, bishop's gambit, Steinitz defence2100.0%50.0%
C33KGA, bishop's gambit, classical defence250.0%25.0%
C33King's gambit accepted20.0%100.0%
C37KGA, Muzio gambit20.0%0.0%
C37KGA, Muzio gambit, From defence250.0%25.0%
C37KGA, Salvio gambit250.0%25.0%
C38KGA, Hanstein gambit20.0%0.0%
C38King's knight's gambit20.0%50.0%
C39KGA, Kieseritsky, Rice gambit2100.0%50.0%
C39KGA, Kieseritsky, Salvio (Rosenthal) defence250.0%75.0%
C41Philidor, Lopez counter-gambit20.0%100.0%
C44Ponziani, Romanishin variation250.0%75.0%
C46Three knights, Schlechter variation250.0%75.0%
C52Evans gambit, Alapin-Steinitz variation250.0%75.0%
C52Evans gambit, Lasker defence20.0%50.0%
C52Evans gambit, compromised defence250.0%25.0%
C53Giuoco Piano, Anderssen variation250.0%75.0%
C55Two knights, Max Lange attack20.0%0.0%
C57Two knights defence, Fegatello attack, Leonhardt variation20.0%0.0%
C58Two knights defence, Yankovich variation20.0%50.0%
C67Ruy Lopez, Berlin defence, Minckwitz variation20.0%100.0%
C71Ruy Lopez, modern Steinitz defence, Three knights variation250.0%75.0%
C78Ruy Lopez, ...b5 & ...d620.0%50.0%
C82Ruy Lopez, open, Dilworth variation20.0%50.0%
C89Ruy Lopez, Marshall, main line, 14...Qh320.0%50.0%
C96Ruy Lopez, closed, Rossolimo defence250.0%75.0%
D18QGD Slav, Dutch, Lasker variation20.0%100.0%
D23Queen's gambit accepted20.0%0.0%
D26QGA, classical, Steinitz variation20.0%100.0%
D32QGD, Tarrasch defence, 4.cd ed250.0%25.0%
D33QGD, Tarrasch, Wagner variation250.0%75.0%
D50QGD, Semi-Tarrasch, Krause variation250.0%25.0%
D53QGD, 4.Bg5 Be7, 5.e3 O-O250.0%75.0%
D57QGD, Lasker defence, Bernstein variation20.0%50.0%
D63QGD, Orthodox defence, Pillsbury attack20.0%50.0%
D67QGD, Orthodox defence, Bd3 line20.0%100.0%
D67QGD, Orthodox defence, Bd3 line, Janowski variation20.0%100.0%
D90Gruenfeld, Schlechter variation20.0%100.0%
E08Catalan, closed, 7.Qc220.0%100.0%
E23Nimzo-Indian, Spielmann, 4...c5, 5.dc Nc620.0%50.0%
E30Nimzo-Indian, Leningrad, ...b5 gambit20.0%0.0%
E53Nimzo-Indian, 4.e3, Gligoric system with 7...Nbd7250.0%75.0%
A02Bird, From gambit10.0%100.0%
A03Mujannah opening10.0%0.0%
A05Reti, King's Indian attack, Reti-Smyslov variation10.0%0.0%
A06Tennison (Lemberg, Zukertort) gambit10.0%100.0%
A12English, Caro-Kann defensive system, Bogolyubov variation10.0%0.0%
A16English, Anglo-Gruenfeld, Smyslov defense1100.0%50.0%
A25English, closed, 5.Rb1 Taimanov variation10.0%0.0%
A25English, closed, Taimanov variation1100.0%50.0%
A38English, symmetrical, main line with b310.0%0.0%
A42Modern defence, Averbakh system, Randspringer variation1100.0%50.0%
A44Old Benoni defence10.0%0.0%
A45Canard opening1100.0%50.0%
A46Queen's pawn, Torre attack, Wagner gambit10.0%0.0%
A47Queen's Indian, Marienbad system10.0%100.0%
A59Benko gambit, 7.e41100.0%50.0%
A68Benoni, four pawns attack10.0%0.0%
A70Benoni, classical without 9.O-O10.0%100.0%
A71Benoni, classical, 8.Bg510.0%100.0%
A77Benoni, classical, 9...Re8, 10.Nd21100.0%50.0%
A81Dutch defence, Blackburne variation10.0%0.0%
A81Dutch, Leningrad, Karlsbad variation1100.0%50.0%
A82Dutch, Balogh defence10.0%100.0%
A82Dutch, Staunton gambit, Tartakower variation1100.0%50.0%
B01Scandinavian, Anderssen counter-attack, Goteborg system10.0%100.0%
B02Alekhine's defence, Steiner variation10.0%0.0%
B03Alekhine's defence, four pawns attack, fianchetto variation10.0%100.0%
B05Alekhine's defence, modern, Panov variation10.0%100.0%
B06Robatsch defence, three pawns attack1100.0%50.0%
B09Pirc, Austrian attack, Ljubojevic variation10.0%100.0%
B31Sicilian, Nimzovich-Rossolimo attack, Gurgenidze variation10.0%100.0%
B40Sicilian, Pin, Jaffe variation10.0%100.0%
B69Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 11.Bxf610.0%100.0%
B83Sicilian, modern Scheveningen, main line with Nb310.0%0.0%
B85Sicilian, Scheveningen, classical variation with ...Qc7 and ...Nc610.0%0.0%
C00French, Wing gambit10.0%0.0%
C07French, Tarrasch, Eliskases variation10.0%0.0%
C10French, Rubinstein, Capablanca line10.0%100.0%
C12French, MacCutcheon, Bernstein variation10.0%100.0%
C12French, MacCutcheon, Chigorin variation1100.0%50.0%
C13French, Albin-Alekhine-Chatard attack, Teichmann variation10.0%100.0%
C13French, classical, Vistaneckis (Nimzovich) variation10.0%100.0%
C14French, classical, Stahlberg variation10.0%0.0%
C15French, Winawer, Alekhine gambit10.0%100.0%
C23Bishop's opening, Lewis counter-gambit10.0%0.0%
C23Bishop's opening, Philidor counter-attack10.0%100.0%
C29Vienna gambit, Kaufmann variation10.0%100.0%
C29Vienna gambit, Steinitz variation10.0%100.0%
C30KGD, 2...Nf610.0%0.0%
C30KGD, Keene's defence10.0%100.0%
C31KGD, Falkbeer, 3...e41100.0%50.0%
C31KGD, Falkbeer, 4.d31100.0%50.0%
C31KGD, Falkbeer, Morphy gambit10.0%0.0%
C31KGD, Falkbeer, Nimzovich variation10.0%100.0%
C33KGA, Keres (Mason-Steinitz) gambit10.0%100.0%
C33KGA, bishop's gambit, Boren-Svenonius variation10.0%0.0%
C33KGA, bishop's gambit, Cozio (Morphy) defence1100.0%50.0%
C33KGA, bishop's gambit, Maurian defence10.0%100.0%
C37KGA, MacDonnell gambit1100.0%50.0%
C37KGA, Rosentreter gambit10.0%100.0%
C37KGA, Silberschmidt gambit10.0%0.0%
C39KGA, Kieseritsky, Berlin defence10.0%0.0%
C39KGA, Kieseritsky, Paulsen defence1100.0%50.0%
C40Latvian, Fraser defence10.0%100.0%
C41Philidor, Hanham, Delmar variation1100.0%50.0%
C41Philidor, Hanham, Kmoch variation10.0%0.0%
C41Philidor, Hanham, Steiner variation10.0%100.0%
C41Philidor, Nimzovich, Sokolsky variation10.0%100.0%
C41Philidor, Nimzovich, Sozin variation10.0%100.0%
C42Petrov, classical attack, Krause variation1100.0%50.0%
C42Petrov, classical attack, Maroczy variation10.0%100.0%
C44Ponziani, Reti variation10.0%100.0%
C44Scotch, Goering gambit, Bardeleben variation10.0%0.0%
C44Tayler opening1100.0%50.0%
C45Scotch, Paulsen attack10.0%0.0%
C45Scotch, Tartakower variation10.0%0.0%
C46Three knights, Steinitz, Rosenthal variation10.0%0.0%
C48Four knights, Rubinstein counter-gambit, Bogolyubov variation10.0%0.0%
C48Four knights, Spielmann variation1100.0%50.0%
C49Four knights, Svenonius variation10.0%100.0%
C51Evans gambit declined10.0%0.0%
C51Evans gambit, Steinitz variation10.0%0.0%
C53Giuoco Piano, Mestel variation10.0%100.0%
C55Two knights, Max Lange attack, Steinitz variation10.0%100.0%
C58Two knights defence, Colman variation10.0%100.0%
C65Ruy Lopez, Berlin defence, Anderssen variation1100.0%50.0%
C65Ruy Lopez, Berlin defence, Kaufmann variation10.0%100.0%
C66Ruy Lopez, closed Berlin defence, Bernstein variation10.0%0.0%
C70Ruy Lopez, Graz variation10.0%100.0%
C80Ruy Lopez, open, Friess attack10.0%100.0%
C82Ruy Lopez, open, Motzko attack, Nenarokov variation10.0%0.0%
C83Ruy Lopez, open, 9...Be7, 10.Re110.0%100.0%
C89Ruy Lopez, Marshall, Herman Steiner variation10.0%0.0%
C89Ruy Lopez, Marshall, Kevitz variation10.0%0.0%
C96Ruy Lopez, closed, Keres (...Nd7) defence10.0%100.0%
D00Blackmar-Diemer gambit10.0%100.0%
D00Blackmar-Diemer, Euwe defence1100.0%50.0%
D00Queen's pawn, stonewall attack1100.0%50.0%
D08QGD, Albin counter-gambit, Balogh variation10.0%0.0%
D08QGD, Albin counter-gambit, Krenosz variation10.0%100.0%
D31QGD, semi-Slav, Junge variation10.0%100.0%
D32QGD, Tarrasch defence, Tarrasch gambit10.0%0.0%
D49QGD semi-Slav, Meran, Rabinovich variation10.0%100.0%
D51QGD10.0%0.0%
D51QGD, Manhattan variation10.0%0.0%
D55QGD, Neo-orthodox variation1100.0%50.0%
D63QGD, Orthodox defence, Capablanca variation10.0%100.0%
D64QGD, Orthodox defence, Rubinstein attack, Gruenfeld variation10.0%0.0%
D67QGD, Orthodox defence, Bd3 line, 11.O-O10.0%100.0%
D83Gruenfeld, Gruenfeld gambit10.0%100.0%
D86Gruenfeld, exchange, Simagin's improved variation1100.0%50.0%
D86Gruenfeld, exchange, Simagin's lesser variation10.0%100.0%
D99Gruenfeld defence, Smyslov, Yugoslav variation10.0%100.0%
E12Queen's Indian, 4.Nc3, Botvinnik variation10.0%0.0%
E24Nimzo-Indian, Saemisch, Botvinnik variation10.0%0.0%
E36Nimzo-Indian, classical, Botvinnik variation10.0%0.0%
E60King's Indian, 3.g3, counterthrust variation10.0%0.0%
E60King's Indian, Danube gambit10.0%100.0%
E82King's Indian, Saemisch, double fianchetto variation10.0%100.0%
E87King's Indian, Saemisch, orthodox, Bronstein variation10.0%100.0%
E92King's Indian, classical variation10.0%0.0%
E99King's Indian, orthodox, Aronin-Taimanov, Benko attack1100.0%50.0%
Created in 2005-2012 by Kirill Kryukov
Updated on June 16, 2013